fix(app kustomization): don't mix vars & setters

* Don't use kpt setters and FluxCD variables within the same field, see kptdev/kpt#3965.
* Bind the default Secret in addition to the user-defined one in order to update the app's default configuration along with the rest of the manifest.

deploy/app/appconfigschema.yaml

@@ -1,11 +1,15 @@
 apiVersion: apps.kubemate.mgoltzsche.github.com/v1alpha1
 kind: AppConfigSchema
 metadata:
-  name: mopidy # kpt-set: ${name}
+  name: ${APP_NAME:=app}
 spec:
   params:
   - name: MOPIDY_YOUTUBE_ENABLED
-    title: Use the Youtube Data API
+    title: Use Youtube
+    type: bool
+    category: Youtube
+  - name: MOPIDY_YOUTUBE_API_ENABLED
+    title: Use Youtube Data API
     type: bool
     category: Youtube
   - name: MOPIDY_YOUTUBE_API_KEY

deploy/app/defaults.yaml

@@ -1,9 +1,7 @@
 apiVersion: v1
 kind: Secret
 metadata:
-  name: mopidy-defaults # kpt-set: ${name}-defaults
-  annotations:
-    kubemate.mgoltzsche.github.com/default-config: "true"
+  name: ${APP_NAME:=app}-defaults
 stringData:
   MOPIDY_MPD_PASSWORD: generate
   MOPIDY_YOUTUBE_ENABLED: "true"

deploy/app/deployment-patch.yaml

@@ -9,4 +9,6 @@ spec:
       - name: app
         envFrom:
         - secretRef:
-            name: ${APP_CONFIG_SECRET_NAME:=mopidy-defaults} # kpt-set: ${APP_CONFIG_SECRET_NAME:=${name}-defaults}
+            name: ${APP_NAME:=app}-defaults
+        - secretRef:
+            name: ${APP_CONFIG_SECRET_NAME:=app-defaults}

deploy/base/deployment.yaml

@@ -39,23 +39,6 @@ spec:
       - name: app
         image: ghcr.io/mgoltzsche/mopidy:0.5.1 # kpt-set: ${image}:${version}
         imagePullPolicy: IfNotPresent
-        env:
-        - name: MOPIDY_YOUTUBE_ENABLED
-          value: "true"
-        - name: MOPIDY_YOUTUBE_API_ENABLED
-          value: "true"
-        - name: MOPIDY_YOUTUBE_API_KEY
-          value: ""
-        - name: MOPIDY_YOUTUBE_MUSICAPI_ENABLED
-          value: "false"
-        - name: MOPIDY_YOUTUBE_MUSICAPI_COOKIE
-          value: ""
-        - name: MOPIDY_YOUTUBE_MUSICAPI_CHANNEL
-          value: UCYwjcFiUg8PpWM45vpBUc3Q
-        - name: MOPIDY_YOUTUBE_MAX_SEARCH_RESULTS
-          value: "15"
-        - name: MOPIDY_YOUTUBE_MAX_VIDEOS
-          value: "20"
         resources:
           limits:
             cpu: 200m